一直搞不清楚記憶體對應檔的意思,今天在MSDN上看到的,應該比較好明白: Memory-mapped files (MMFs) offer a unique memory management feature that allowsapplications to access files on disk in the same way they access dynamicmemory—through pointers. With this capability you can map
多線程可以提高應用程式的效率,這是肯定的,但是,效率是不是最優的呢,是不是覺得多線程很複雜呢? 前面學習線程的知道,用多線程需要CreateThread建立線程,還要關閉線程。另外,多線程有時候還要對資源進行同步,也就是說,需要用到事件,信標,互斥對象。 當然,線程與進程比較,無論速度,對資源的訪問,安全性上麵線程都有非常大的優勢。但是,建立與銷毀線程並不是免費的。 要建立一個線程,需要分配和初始化一個核心對象,也需要分配和初始化線程的堆棧空間,而且 Windows
As Long As We Got Each Other Show me that smile again Oh, show me that smile Don't waste another minute on your crying We're nowhere near the end We're nowhere near The best is ready to begin All in a cloudy daze I look into your eyes and see them
在bash指令碼編程中,有些地方比較容易迷惑,也容易出錯。今天就碰到一例,例如:if["$UID" -ne "$ROOT_UID"]then echo "Must be root to run this script" exit $E_NOTROOTfi就以上幾行代碼,就有兩處錯誤。1) if和[之間沒有空格。 產生錯誤。2)
這篇文章摘自http://www.altools.net/,著作權為別人所有,工作中因需要查閱,所以轉載自此. FTP response codes are 3 digits, with the first 2 digits giving specific information on the type of response, and the final digit revealing the exact nature of the code.
How many roads must a man walk down 一個男人要走過多少路, Before you call him a man 才可以稱為男人? How many seas must a white dove sail 一隻白鴿要飛過多少片海, Before she sleeps in the sand 才能在沙灘上入眠? How many times must the cannonballs fly 炮彈要橫行多久, Before